Language Details: Objective-C

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Objective-C is a general-purpose, high-level, object-oriented programming language that adds Smalltalk-style messaging to the C programming language.
— Objective-C article on Wikipedia


~~Kilew~~ (14 sets) ~~chunkyguy~~ (2 sets)	~~peroxyacyl~~ (5 sets) ~~ricard.perez~~ (4 sets)	~~Edd~~ (4 sets) ~~Paxswill~~ (4 sets)	~~stephens2424~~ (3 sets)

Problems solved

Qualification Round (25 solutions by 6 contestants):

Bot Trust: 6 small solutions, 6 large solutions.
Magicka: 6 small solutions, 3 large solutions.
Candy Splitting: 1 small solution, 1 large solution.
GoroSort: 1 small solution, 1 large solution.

Round 1A (2 solutions by 1 contestant):

FreeCell Statistics: 1 small solution, 1 large solution.

Round 1B (4 solutions by 2 contestants):

RPI: 2 small solutions, 2 large solutions.

Round 1C (5 solutions by 2 contestants):

Square Tiles: 2 small solutions, 2 large solutions.
Perfect Harmony: 1 small solution.

Submission Origin

United States (2 contestants)
United Kingdom (1 contestant)
Ukraine (1 contestant)

Spain (1 contestant)
Japan (1 contestant)
India (1 contestant)